They're fine for occasional use, but not for daily use. I had one on my beater bike that I used daily in flashing mode, and the battery wore out in around 2 weeks. Definitely nice and bright for the size, though, and small enough to tuck away for an emergency flat battery "be seen" situation. I can see them being handy for touring, too, due to the size, plus the fact you can use the red one at night to see without losing your night vision.